Machine for feeding sheets of paper.



PATBNTED MAY 31, 19.04.

A. GUTBERLET. -MAGH-INE FOR FEEDING SHEETS OF PAPER.

'APPLIOATION I'ILBD SEPT. 22. 1902.

2 SHEETS-SHEET 1.

N0 MODEL.

- AWN/W TNE "cams wsrzas co. "HOTO-UTHOH WASHINGTfl'i. u c.

PATENTED MAY 31, 1904. A. GUTBERLET. MACHINE FOR FEEDING SHEETS OF PAPER.

APPLICATION FILED SEPT. 22. 1902.

2 SHEEN-SHEET 2.

E0 MODEL.

m -6M fy ilk/27017591.

v PHOTO-LUNG WASHINGTON. n c

UNITED STATES Patented May 31, 1904.

PATENT OFFICE.

MACHINE FOR FEEDING SHEETS OF PAPER.

SPECIFICATION forming part of Letters Patent No. 761,069, dated May 31, 1904.

Application filed September 22, 1902. Serial No. 124,449. (No model.)

To aZZ whom it may concern.-

Be it known that I, ARTHUR GUTBERLET, a subject of the Emperor of Germany, whose post office address is Aeussere Halleschestrasse 135, Leipzig-Gohlis, Germany, have invented certain new and useful Improvements in Machines for Feeding Sheets of Paper; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a pneumatic taking-ofi device for paper-feeding machines in which sheets of paper are fed from a pile, and has for its object to provide a taking-off device which shall insure the removal of only one sheet at a time.

In the drawings, Figure 1 is a longitudinal section of a feeding-machine fitted with the taking-off device; Fig. 2, a section along the line N N, Fig. 1; Fig. 3, an elevation showing the front edges of the unfolded sheets after the sheet has been transmitted by the suckers a to the suckers Z1; Fig. 4, a side view of the same.

The essential feature of the invention is the lifting of the top sheet of the pile of paper by means of two suckers a 6, the one sucker a oscillating around a fixed point and lying on the pile of paper and bending the top sheet against the other sucker, I), which is fixed and retains the sheet of paper bent and then re leased by the first sucker until the conveyingrollers (Z g are forced to convey the same to the laying-on'board h. The suckers a b are held by a fixed bar 8, placed transversely over the machine-table 7c, the suckers a being pivoted at d in such a way that they can be swung downward so far that their under surfaces come into the same horizontal plane a the holding-rail s, Fig. 1, in dotted lines and -LJ ig. 4:. The fixed suckers Z) are held by the ar 8 and arranged at an angle in relation to the pile of paper, Fig. 4;. The swinging motion of the suckers a is imparted by the lever 01.

through the medium of the link on. The lever a is firmly keyed to the shaft 9, which is moved backward and forward from a suitable spot in the machine driving-gear at regular intervals for the purpose of lowering and raising the suckers a.

The shafts 1' 0, supporting the conveyingrollers d g, are held by swinging arms a '0, which are moved toward one another by suitable cam-disks mounted on a cam-shaft w and operating the arms a '2; through rocking arms in g and rods a o. The rollers d g are thus brought together and pressed against opposite sides of the raised sheet, the roller 9 being at the same time rotated to feed the sheet forward by a suitable driving-pulley 2 and beltmg 2 z.

The suckers a b are each connected with a separate suction-pipe e j, which either, as in the form illustrated, lead to one or to separate suction apparatus. In both cases care must be taken that the pipe f can be wholly or partially shut off for a time, which can be effected by means of a valve t, opened and closed mechanically by the machine. The suction-pipe 6 may be arranged to work continuously or intermittently. The only condition is that it shall act as soon as the suckers a have raised the top sheet of paper, so that the suckers b retain the sheet of paper until the conveyingrollers 9 (Z take hold of it and, continuing to rotate, carry it to the laying-on board. In consequence of the sudden complete or partial interruption of the suctional action of the suckers a, the raised sheet of paper held by Z) is so forcibly shaken that should the following sheet of paper be adhering to it it must be loosened and falls onto the pile of paper before the conveying-rollers d g are moved in the direction of the sheet.

What I claim, and desire to secure by Let ters Patent, is

In machines for feeding sheets of paper from a pile, a pneumatic taking-ofi device comprising fixed suckers mounted at an angle to the plane of the paper, movable suckers adapted should it have been bent with the top sheet to to bend the front part of the top sheet upward fall onto the pile of paper. IO and lay it against the surfaces of the inclined In testimony whereof I have affixed my sigand fixed suckers, means for wholly or parnature in presence of two Witnesses.

5 tially putting the movable suckers out of ae- ARTHUR GUTBERLET.

tion in order to release the sheet of paper now Witnesses: held by the fixed suckers and also to shake the HERM. SACH,

sheet to cause the following sheet of paper RUDOLPH FRICKE. 

